/* Copyright  2009
   @Author
   Richard Changde Yin            e-mail yinchangde@hotmail.com

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; version 2 of the License.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */

/*
*  @filename:  field/long.h
*/

#ifndef _SERVER_FIELD_LONG_H
#define _SERVER_FIELD_LONG_H

#include <field/num.h>

class Field_long :public Field_num {
public:

  using Field::val_int;
  using Field::val_str;
  using Field::cmp;
  using Field::pack;
  using Field::store;
  using Field::unpack;

  Field_long(unsigned char *ptr_arg, uint32_t len_arg, 
             unsigned char *null_ptr_arg,
	           unsigned char null_bit_arg,
	           enum utype unireg_check_arg, 
             const char *field_name_arg,
	           bool zero_arg, bool unsigned_arg)
            :Field_num(ptr_arg, len_arg, null_ptr_arg, 
                       null_bit_arg,unireg_check_arg, field_name_arg,
	                     0, zero_arg,unsigned_arg)
             {}
  Field_long(uint32_t len_arg,bool maybe_null_arg, const char *field_name_arg,
	     bool unsigned_arg)
           :Field_num((unsigned char*) 0, len_arg, 
                       maybe_null_arg ? (unsigned char*) "": 0,0,
	                     NONE, field_name_arg,0,0,unsigned_arg)
             {}
  enum Item_result result_type () const { return INT_RESULT; }
  
  enum_field_types type() const { return COLLAPSAR_TYPE_LONG;}
  
  enum ha_base_keytype key_type() const
    { return unsigned_flag ? HA_KEYTYPE_ULONG_INT : HA_KEYTYPE_LONG_INT; }
  int store(const char *to,uint32_t length, const CHARSET_INFO * const charset);
  int store(double nr);
  int store(int64_t nr, bool unsigned_val);
  int reset(void) { ptr[0]=ptr[1]=ptr[2]=ptr[3]=0; return 0; }
  double val_real(void);
  int64_t val_int(void);
  String *val_str(String*,String *);
  int cmp(const unsigned char *,const unsigned char *);
  void sort_string(unsigned char *buff,uint32_t length);
  
  uint32_t pack_length() const { return 4; }
  void sql_type(String &str) const;
  /// global.h
  
  uint32_t max_display_length() { return COLLAPSAR_INT32_NUM_DECIMAL_DIGITS; }
  
  virtual unsigned char *pack(unsigned char* to, const unsigned char *from,
                              uint32_t max_length,
                              bool low_byte_first);

  virtual const unsigned char *unpack(unsigned char* to, const unsigned char *from,
                              uint32_t param_data,
                              bool low_byte_first);
};

#endif  //_SERVER_FIELD_LONG_H

